RJM Audio B-Board Project

[Abelma]

Sure, of course. You use a pair of buffer units, one for the positive and one for the negative phase of the balanced signal.

/R

Ok great. So, if I get it, for each channel two boards.
For one channel. Pre XLROut+ to Buffer1IN+. PreXLROut- to Buffer2IN+. And then, XLROutGnd to Buffer1IN- and Buffer2IN- ??
Then from Buffer1Out+ to AmpIN+, Buffer2Out+ to AmpIN-, and the Buffer1Out-/Buffer2Out- to Amp Gnd ??

What is the output impedance of your buffers?

rgds

 

[rjm]

That connection scheme seems right to me.

The output impedance, for the line drivers at least, are 47 ohms defined by the series output resistor. It can be made lower, as when they are used as headphone drivers.

Richard

 

[Abelma]

That connection scheme seems right to me.

The output impedance, for the line drivers at least, are 47 ohms defined by the series output resistor. It can be made lower, as when they are used as headphone drivers.

Richard

Ok great to know that I am thinking right, first time to do something like that. Do you sell the boards empty, with components, pricing, you can send a PM as your convenience...rgds

Update...Now I see your web site, I'll send you and email.

 

[Grahamic]

Hi I would like use b-boards to buffer a stepped attenuator. The pcb / kit is not on the web site - are either available?

 

[rjm]

Bboard 11a boards are no longer active but I have boards left over available at a discount. pm me if interested.